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Nature of Business and Significant Accounting Policies - Additional Information (Detail)
3 Months Ended 12 Months Ended
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2017
USD ($)
Segments
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Nature Of Business And Significant Accounting Policies [Line Items]                      
Net loss attributable to Inseego Corp. $ (3,822,000) $ (13,789,000) $ (12,024,000) $ (16,100,000) $ (27,401,000) $ (18,567,000) $ (2,701,000) $ (11,904,000) $ (45,735,000) $ (60,573,000) $ (52,286,000)
Cash and cash equivalents 21,200,000               21,200,000    
Working capital $ 6,500,000               $ 6,500,000    
Number of reportable segments | Segments                 1    
Impairment of indefinite-lived intangible assets                 $ 300,000 0 0
Long-lived assets impairment                 $ 100,000 $ 2,700,000 $ 27,000
Internal Use Software                      
Nature Of Business And Significant Accounting Policies [Line Items]                      
Property, plant and equipment useful lives                 5 years    
Minimum                      
Nature Of Business And Significant Accounting Policies [Line Items]                      
Property, plant and equipment useful lives                 18 months    
General warranty period                 1 year    
Minimum | Rental Assets                      
Nature Of Business And Significant Accounting Policies [Line Items]                      
Property, plant and equipment useful lives                 3 years    
Maximum                      
Nature Of Business And Significant Accounting Policies [Line Items]                      
Property, plant and equipment useful lives                 6 years    
General warranty period                 3 years    
Maximum | Buildings                      
Nature Of Business And Significant Accounting Policies [Line Items]                      
Property, plant and equipment useful lives                 50 years    
Maximum | Rental Assets                      
Nature Of Business And Significant Accounting Policies [Line Items]                      
Property, plant and equipment useful lives                 4 years